This… It is ease vs control. If you have needs inside the box Proxmox has planned for, it is very easy. But if you want to step outside that box, you are in for a world of surprise. I install Proxmox for clients that do not have solid Linux chops. I run KVM/libvirt on my own stuff. And if you need a web front end, oVirt exists…
You do know this is selfhosted, right? People tell us that what we do is “not a good idea” all the time.